s(x) represents a specific function in this context. It is defined as (x^2 - 1) / (x^3 + x^2 + x + 1).
A relationship between two sets where each input value corresponds to exactly one output value.
A statement asserting that two expressions are equal.
Numerator/Denominator: In fractions, numerator refers to the top part and denominator refers to the bottom part.